JP3856562B2 - Roof molding terminal processing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for processing a terminal of an automobile roof molding.
[0002]
[Prior art]
As shown in FIG. 13 , a roof molding 60 is often attached to the roof 51 of the automobile 50. As can be seen from FIG. 14 showing a part of the roof 51 with the roof molding 60 removed, the roof molding 60 hides the joining line of the portion where the roof panel 52 and the outer side panel 53 are joined together. It fits into a groove 54 formed at the joint between both panels 52 and 53.
[0003]
As understood from FIG. 15 , the roof molding 60 includes a leg portion 61 and a decorative portion 65 which is provided at the upper end of the leg portion 61 and serves as a design surface, and the leg portion is formed in the groove 54 of the joint portion. 61 is inserted and the decorative portion 65 is attached so as to close the groove 54. Further, a metal core 63 is often embedded in the leg portion 61 along the longitudinal direction in order to correctly attach and hold the roof molding 60 to the groove 54 of the joint portion and reduce linear expansion. Reference numeral 66 is a lip (fin piece) formed along the longitudinal direction on both side surfaces of the lower portion of the leg portion 61 in order to ensure the fixing to the groove 54.
[0004]
By the way, the groove 54 at the joint portion of the roof 51 is torn gradually toward the end of the groove 54 because the upper corner portion 55 is torn when both ends thereof are press-molded at the same depth as the center of the groove 54. Yes. Therefore, if the molding material 60a made of a long extruded product is simply cut into a predetermined length as the roof molding 60, the lower end of the leg portion 61 interferes with the body and the roof molding 60 can be correctly attached. Disappear. Therefore, recently, the end portion of the molding material 60a cut to a predetermined length as shown in FIG. 15, the terminal portion 62 to match the depth of the end portion of the groove 54 be injection molded has been proposed.
[0005]
However, in the case where the terminal part 62 is injection-molded, a seam line 67 is generated between the molding material 60 a and the terminal part 62 on the surface of the terminal part of the roof molding 60. There was a problem that damaged. Further, since the main body part made of the molding material 60a and the injection molded terminal part 62 have different resin shrinkage rates, cracks occur in the seam line 67 due to differences in heat shrinkage and deterioration. In some cases, the terminal unit 62 and the molding material 60a may be separated.
[0006]
In addition, the groove 54 of the roof 51 is often curved in the plane direction or the height direction in the vicinity of the end thereof, and the lip 66 such as the molding material 60a is used for the terminal portion 62 that has been injection molded. Therefore, the terminal portion 62 cannot be correctly fixed along the groove 54 as it is, and a gap is formed between the one side of the terminal portion 62 and the side surface of the groove 54, or the terminal portion 62 is lifted from the groove 54. Or Therefore, conventionally, the terminal portion 62 is fixed to the end portion of the groove 54 with a double-sided tape or an adhesive. However, it takes time to fix the terminal portion 62, and the cost increases. There is a problem that the terminal unit 62 tends to rise from 54.
[0007]
In order to make the terminal portion 62 follow the curved shape of the end portion of the groove 54, a protrusion is formed on the side surface of the terminal portion 62 during the injection molding of the terminal portion 62, and the side surface and the terminal portion of the groove 54 end portion are formed. It is conceivable that the distance between the side surfaces of 62 is made constant, or that a clip is provided at the end of the groove 54 and a portion that engages with a claw of the clip is formed in the terminal portion 62. The strength of the joint between the part 62 and the molding material 60 a is weak, and if the terminal part 62 is bent and attached to the groove 54 of the roof 51, it may be separated from the joint line 67. In order to avoid this problem, it may be possible to form only the protrusions etc. on the molding material 60a cut into a predetermined shape by injection molding, but even in this case, the protrusions and the molding material 60a The adhesive strength is weak, and there is a risk of peeling or dropping off at that portion.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and there is no seam line on the design surface of the terminal portion, the appearance is beautiful and excellent in durability, and it can be accurately and reliably fixed to the groove of the roof. A terminal processing method for roof molding for automobiles is provided.
[0009]
[Means for Solving the Problems]
The invention of claim 1 is the following: after cutting the back side of the terminal part of the resin molding material having a predetermined cross-sectional shape to thin the tip side of the terminal part, and softening the terminal part of the molding material by heating, In the processing method of the terminal part that receives the design surface of the terminal part with a receiving die and presses the back surface of the terminal part with a pressing die, the terminal part is placed at a required position of the pressing die surface facing the excision part on the back surface of the terminal part. the pressing projections along the width direction is provided, and further the projections forming grooves in the vertical direction is provided on a side surface of the mold surface continued from both ends of the pressing projections, fixedly mounted protruding in the width direction of the terminal portion According to the method of processing the end portion of the roof molding, the projection portion for forming is formed along the height direction of the roof molding.
[0010]
In the invention of claim 2, the back side of the terminal part of the resin molding material having a predetermined cross-sectional shape is cut off to thin the tip side of the terminal part, and after heating and softening the terminal part of the molding material, In the processing method of the terminal part which receives the design surface of the terminal part with a receiving die and presses the back surface of the terminal part with a pressing die, a rising part is provided in the excision part on the back surface of the terminal part, and the excision of the excision part during the pressing A mounting fixing projection protruding at least on one side in the width direction is formed by pressing the portion and moving the resin of the raised portion to at least one side in the width direction of the terminal portion. It relates to a terminal processing method.
[0011]
A third aspect of the present invention relates to a method for processing a terminal portion of a roof molding according to the first or second aspect, wherein the mounting and fixing projection has a gap between the back side of the design surface.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of an essential part of an automobile roof molding obtained according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a step-by-step cutting process in terminal processing of the automobile roof molding. 4 is a cross-sectional view showing the heat softening process, FIG. 5 is a cross-sectional view showing the pressing process, and FIG. 6 is a cross-sectional view of FIG. 5 cut along the line 6-6, showing the press process stepwise. 7 is a perspective view showing an example of a pressing die used in the pressing process, FIG. 8 is a side view showing a terminal portion of the molding material after excision in the invention of claim 2, and FIG. FIG. 10 is a perspective view of an essential part showing an example of an automobile roof molding obtained by the invention of claim 3, FIG. 11 is a sectional view showing the pressing process, FIG. 12 of claim 3 It is a perspective view of a main part showing another example of an automotive roof molding obtained by light.
[0013]
First, an example of an automobile roof molding obtained by the roof molding terminal processing method according to the invention of claim 1 will be described, and then an example of the roof molding terminal processing method will be described.
[0014]
The roof molding 10 for an automobile shown in FIGS. 1 and 2 has a predetermined cross-sectional shape shown in FIG. 3A in which a leg portion 13 in which a metal core 14 is embedded and a decorative portion 15 are integrally formed at the upper end of the leg portion 13. from extrusion of the resin molding material 11 consisting, in which the terminal unit by the invention of claim 1 is processed, a body portion 10a mounted on the deep portion of the groove 54 of the roof 51 shown in FIG. 13, The terminal portion 12 attached to the shallow end portion of the groove 54 is a series without a seam line.
[0015]
The decorative portion 15 has an outer surface constituting the design surface 16 and is wide enough to close the groove 54 and protrudes from the upper end of the leg portion 13 to both sides in the width direction. The tip 23 of the terminal portion 12 is bent downward. Has been.
On the other hand, the leg portion 13 is inserted into the groove 54 of the roof 51 to fit the roof molding 10 into the groove 54. In order to stably hold the roof molding 10 by pressing against the side wall of the groove 54 when inserted into the groove 54, a lip 17 made of a soft resin is integrally formed. In the terminal portion 12 of the roof molding 10, the leg portion 13 is obliquely cut from the lower side of the leg portion 13 toward the back side of the design surface 16 so as to become thinner from the main body portion 10 a toward the distal end 23 of the terminal portion 12. The lip 17 is also removed. Reference numeral 21 denotes a cut portion of the leg portion 13 formed by the cutting, and is cut according to the depth of the end portion of the groove 54 of the roof 51. In this embodiment, the leg portion 13 is completely removed together with the metal core material 14 near the tip 23 of the terminal portion 12.
[0016]
On the side surface of the cut portion 21 of the leg portion 13, a mounting and fixing projection 22 that protrudes in the width direction of the roof molding 10 is formed in a rib shape along the height direction of the roof molding 10. The mounting and fixing projection 22 has a function in place of the lip 17 in the cut portion 21 of the leg portion 13 from which the lip 17 has been cut, and the end portion 12 is mounted on the end of the groove 54 of the roof 51. At this time, the terminal portion 12 is fixed to a correct position in the end portion of the groove 54 by pressing against the side wall of the groove 54, and the terminal portion 12 is prevented from being lifted from the groove 54 or biased to one side of the groove 54. The mounting and fixing projections 22 of this embodiment are formed at one place on both side surfaces of the cut portion 21, but the present invention is not limited to this. It is effective to approach the 12 tip 23. Further, bent grooves 24 along the width direction are formed on the lower surface of the cut portion 21 at a predetermined interval. The bent groove 24 facilitates the bending of the terminal portion 12 according to the curvature of the bottom surface of the groove 54 when the terminal portion 12 is mounted on the groove 54 of the roof 51.
[0017]
Next, an example of the terminal processing method of the roof molding 10 will be described. First, a resin molding material 11 of an extruded product having a predetermined cross-sectional shape shown in FIG. 3A, that is, the decorative portion 15 and the leg portion 13 is cut into a predetermined length. The surface of the decorative portion 15 constitutes a design surface 16, while a metal core 14 is embedded in the leg portion 13 and a lip 17 is formed at the lower end of the leg portion 13.
[0018]
With respect to the molding material 11 of the predetermined length, the decorative portion 15 is left on the back side of the terminal portion 12, and the leg portion 13 is partially extended from the terminal portion tip 23 over a predetermined length as shown in FIG. 3B. Resect. The excision of the leg portion 13 is performed over a range corresponding to the shallow portion at the end portion of the groove 54 of the roof, and the terminal is formed from the body portion 10a side of the molding material 11 where the leg portion 13 is not excised. The lower end of the cut portion 21 is cut into a shape inclined toward the back surface of the design surface 16 so that the molding material 11 becomes thinner toward the tip portion 23. Furthermore, in this example, the leg portion 13 is completely removed together with the metal core material 14 in the vicinity of the distal end portion 23. The excision method is performed by a known cutting method using a cutter or a press.
[0019]
Next, as shown in FIG. 4, the terminal portion 12 of the molding material 11 is disposed on the receiving die 36 of the press mold 30, and the cutting portion 21 of the terminal portion 12 is heated and softened by heating means H such as a heater. The receiving mold 36 is formed with a cavity surface 37 having a desired roof molding terminal shape. The degree of heating is such that the terminal portion 12 is softened, and is set to an appropriate temperature according to the material of the molding material 11.
[0020]
After the heat softening of the terminal portion 12, as shown in FIGS. 5 and 6, the cut portion 21 of the terminal portion 12 is pressed by the pressing die 31 of the press mold 30 and shaped into a desired terminal shape. As shown in FIG. 7, the mold surface 32 of the pressing mold 31 is recessed in this example, and is used for pressing at a portion where the surface (lower end) of the back surface cut portion 21 of the molding material terminal portion 12 is disposed. A protrusion 33 is formed along the width direction of the terminal portion 12 of the molding material 11, and a protrusion-forming concave groove 34 is formed in the vertical direction on the side surface 32 a of the mold surface 32 continuing from both ends of the pressing protrusion 33. Yes. The pressing protrusion 33 and the protrusion forming groove 34 are for forming the mounting and fixing protrusion 22 in the molding terminal portion 12 in FIGS. 1 and 2. Therefore, the surface of the cut portion 21 that has been softened at the time of pressing is pressed by the pressing projection 33, and the pressed resin of the cut portion 21 continues from both ends of the pressing projection 33. The mounting and fixing protrusion 22 is guided to the concave groove 34 and hardened to form the side surface of the cut portion 21.
[0021]
Further, in this embodiment, a bending groove pressing projection 35 for forming the bending groove 24 of the roof molding 10 is formed on the mold surface 32 of the pressing mold 31 along the width direction of the molding material 11. The bent groove 24 is formed during the pressing. Moreover, the resin which becomes the surplus of the terminal part 12 becomes a burr | flash, is formed in the edge of the terminal part 12, and is finally removed. Thereafter, by opening the press mold 30 and taking out the molded product, the terminal portion 12 of the desired roof molding 10 shown in FIGS. 1 and 2 is obtained. In the press mold 30 in the above embodiment, the mold surface 32 of the press mold 31 and the cavity surface 37 of the receiving mold 36 are both inclined, but one of the mold surfaces (or cavities) is substantially horizontal, The other cavity (or mold surface) may be inclined corresponding to one.
[0022]
FIG. 8 is a side view showing the terminal portion 12 after the molding material 11 is cut out in the embodiment of the invention of claim 2. In this embodiment, a predetermined amount of raised portion 21a is provided on the surface (lower end) of the cut portion 21 of the leg portion 13 on the back surface of the terminal portion 12. The raised portion 21a is obtained by leaving a larger amount of resin at a predetermined position on the surface of the cut portion 21 than at the other portions. Then, in the same manner as the embodiment of the first aspect of the present invention, after softening by heating, the terminal portion 12 is processed by pressing with a press mold 30 as shown in FIG. At this time, as shown in FIG. 9A, the raised portion 21a of the excision portion 21 is pressed by the pressing protrusion 33 of the pressing die 31, and the resin of the raised portion 21a moves in the width direction as shown in FIGS. 9B and 9C. By moving and flowing into the protrusion-forming concave groove 34 of the pressing die 31, the mounting and fixing protrusion 22 protruding in the width direction of the roof molding 10 is formed. The raised portion 21a can be easily formed by cutting away the back surface of the end portion 12 of the molding material 11 in anticipation of the shape of the raised portion 21a at a predetermined position. Further, when the raised portion 21a is provided, the pressing protrusion 33 of the pressing die 31 is not necessarily required.
[0023]
In addition, in the attachment fixing protrusion 22 protruding in the width direction of the terminal portion 12 formed in this way, a dent (sink) may be generated in the design surface 16. This is because the mounting and fixing projection 22 is integrally formed on the back surface of the decorative portion 15, so that the decorative portion is between the portion where the mounting and fixing projection 22 is provided and the other portion where it is not provided. It is considered that the thickness and volume of the resin in No. 15 are greatly different, and as a result, the amount of heat held at the time of heat softening is different, and the subsequent shrinkage rate is greatly changed.
[0024]
Therefore, as shown in FIG. 10, it is preferable to form a gap s between the mounting and fixing projection 22 and the back surface of the design surface 16, that is, the back surface of the decorative portion 15. In addition, according to the gap s formed in this way, not only the appearance defects that occur on the design surface 16 as described above can be avoided, but also the claw (clip) in the groove 54 of the roof 51. Etc., the gap s can be used as a locking portion for the locking claw.
[0025]
It is obtained by the invention of claim 3. As shown in FIG. 11 showing an embodiment of the invention of claim 3, a slide mold 39 having the height of the gap s is provided in the receiving mold 36 so as to be slidable in the horizontal direction, and the press by the pressing mold 31 is performed. If the slide mold 39 is inserted into the back side of the decorative portion 15 of the terminal portion 12 of the molding material 11 and press-molded during the process, the gap s can be easily formed.
[0026]
In addition, you may form the terminal part 12 of the roof molding 10 which has the said clearance gap as what has the protrusion part 22A wide in the longitudinal direction as shown in FIG. In such a protrusion 22A, not only can it be fixed as it is in contact with the inner wall of the groove 54 of the roof 51, but a clip corresponding to the protrusion 22A is provided in the groove 54 and fixed. You can also make it. In the figure, the same reference numerals as those in the above embodiment denote the same members.
[0027]
【The invention's effect】
As illustrated and described above, according to the method for processing the end portion of the roof molding according to the inventions of claims 1 to 3, the rear surface side of the end portion of the molding material made of an extrusion-molded product is excised and pressed after heat softening. Unlike the conventional case where the terminal portion is injection-molded, the seam is formed between the terminal portion and the main body portion in order to form the mounting and fixing projection portion protruding at least on one side in the width direction of the terminal portion by being pressed and deformed by Since it does not have a line, it not only has a good appearance, but there is no worry of separation at the seam. In addition, since the mounting and fixing projection is integrally formed with the terminal portion by pressing, the strength of the mounting and fixing projection is high, and the mounting and fixing when the roof molding terminal portion is fitted to the groove end of the roof is reliable. The roof molding terminal part does not lift up from the groove of the roof and the appearance is good.
[0028]
Furthermore, as in the invention of claim 2, a raised portion is provided in a cut portion on the back surface of the terminal portion of the molding material, and the raised portion is fixed by pressing the raised portion with a pressing die during the pressing. In the case of forming, the mounting and fixing protrusion can be easily and sufficiently formed, and a roof molding terminal portion that can be more accurately fixed to the groove end of the roof is obtained. Can do.
[0029]
Further, as in the invention of claim 3, if the mounting and fixing projection is formed with a gap on the back side of the design surface, defects such as sink marks on the design surface caused by the difference in shrinkage after molding Can be eliminated, and a molding terminal portion having a very good appearance can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of an essential part showing an automotive roof molding obtained by an embodiment of the present invention.
FIG. 2 is a side view thereof.
FIG. 3 is a diagram showing step-by-step the cutting process in claim 1;
FIG. 4 is a cross-sectional view showing a heat softening process.
FIG. 5 is a cross-sectional view showing a pressing process.
FIG. 6 is a cross-sectional view showing FIG. 5 in a stepwise manner by cutting FIG. 5 at the position of line 6-6.
FIG. 7 is a perspective view showing an example of a pressing die used in the pressing step.
FIG. 8 is a side view showing a terminal portion after excision in the invention of claim 2;
FIG. 9 is a cross-sectional view showing stepwise the pressing process in the invention of claim 2.
FIG. 10 is a perspective view showing a main part of an example of an automobile roof molding obtained by the invention of claim 3;
FIG. 11 is a cross-sectional view showing the pressing step.
12 is a perspective view of an essential part showing another example of an automobile roof molding obtained by the invention of claim 3. FIG.
FIG. 13 is a perspective view of an example of an automobile equipped with a roof molding.
FIG. 14 is a view showing a part of the roof with the roof molding removed.
FIG. 15 is a perspective view showing a conventional roof molding terminal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Roof molding 11 Molding material 12 Terminal part 21 Cutting part 22 Mounting and fixing protrusion 31 Push mold 32 Mold surface 33 Pressing protrusion 51 Roof 54 Groove

Claims (3)

After cutting the back side of the terminal part of the resin molding material having a predetermined cross-sectional shape to thin the tip side of the terminal part and heat-softening the terminal part of the molding material, the design surface of the terminal part is received. In the processing method of the terminal part that is received by the mold and presses the back surface of the terminal part with the pressing mold,
A pressing protrusion along the width direction of the terminal portion is provided at a required position of the pressing mold surface facing the cut portion on the back surface of the terminal portion, and further on the side surface of the mold surface continuing from both ends of the pressing protrusion. Protrusion forming grooves are provided in the vertical direction,
At the time of the pressing, a pressing projection of the pressing mold presses and deforms the rear surface cut portion of the terminal portion, and a mounting fixing protrusion protruding in the width direction of the terminal portion is formed along the height direction of the roof molding. A terminal molding method for roof molding characterized by the above. After cutting the back side of the terminal part of the resin molding material having a predetermined cross-sectional shape to thin the tip side of the terminal part and heat-softening the terminal part of the molding material, the design surface of the terminal part is received. In the processing method of the terminal part that is received by the mold and presses the back surface of the terminal part with the pressing mold,
A raised portion is provided in the excised portion on the back surface of the terminal portion, and when the pressing is performed, the raised portion of the excised portion is pressed to move the resin of the raised portion to at least one side in the width direction of the terminal portion. A method for processing a terminal portion of a roof molding, comprising forming a fixing portion for fixing that protrudes to at least one side.   3. The roof molding terminal portion processing method according to claim 1, wherein the mounting and fixing projection has a gap between the design surface and the back side.

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